﻿#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#define f(x) x*x
main() {
	int a = 5, b = 2, c;
	c = f(a) / f(b);
	printf("%d", c);
}
int a  = 0;
char * p1;
int main(void) {
	int b;
	char s[] = "abc";
	char * p2;
	char * p3  = "123456";
	static int c  = 0；
		p1  = (char *)malloc(10);
	free(p1);
	return 0;
}